I’m an ethnographic time traveler. For much of the last 10 years, I’ve been studying the ways in which the use of communication technology enables emergent socio-cultural practices around working and living in cities. For example, I’m interested in peer-to-peer networking, bottom-up organizing, co-located online collaboration, user-driven social innovation and open source urbanism, to name just a few. I’ve watched teens use mobile phones in Tokyo, observed activists building Wi-Fi networks on rooftops in Berlin, interviewed freelancers in Starbucks cafes in New York, watched doctors use computers in operating rooms, tested iPhone applications for navigating college campuses, visited design studios in Barcelona, and hung out with hackers in Budapest.